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    Re: The End of Celestial Navigation??
    From: Fred Hebard
    Date: 2008 Jan 2, 15:48 -0500

    On Jan 2, 2008, at 3:28 PM, Lu Abel wrote:
    > Fred Hebard wrote:
    >> On Jan 2, 2008, at 2:07 PM, Lu Abel wrote:
    >>> Greg R. wrote:
    >>>> --- frankreed@HistoricalAtlas.net wrote:
    >>>>> What do you think he's talking about?
    >>>> Obviously someone who hasn't had a major electrical/electronics
    >>>> failure
    >>>> while out on the open ocean...  ;-)
    >>> Would that include my quartz crystal controlled watch?
    >>> I truly believe in the adage that a good navigator has two or more
    >>> sources of positional information available.   And only a fool
    >>> would go
    >>> offshore with a single GPS set, even if it were integrated into the
    >>> fanciest electronic charting system.
    >>> But I can't figure out why the "can't trust electronics, gotta use
    >>> celestial" crowd seems perfectly happy with electronic chronometers
    >>> (synchronized, of course, by listening to WWV or BBC), and perhaps
    >>> even
    >>> reducing their sights using a calculator.   Those electronics are
    >>> subject to exactly the same failure modes as GPS sets.
    >> The answer leads us back to the subject: lunars.  Of course you have
    >> to trust the Nautical Almanac, but....
    >> Fred Hebard
    > Which is generated using *electronic* computers.    Darn, where are
    > those 19th century logarithm tables when we need them!!  :-P
    Maybe when we ban those pesky electronic computers we can go back to
    human computers! Just think, new employment opportunities! ;)
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